Exponential simultaneous equation with powers

  • Thread starter Thread starter acu04348
  • Start date Start date
  • Tags Tags
    Exponential
acu04348
Messages
2
Reaction score
0
Hi there,Struggling with this problem, anyone know how this might be solved?

(e^(r-0.04)^(5/12))(0.9463) = (e^(r-0.04)^(11/12))(0.95152)

and solve for r

Ans: r~2.90%

Would really appreciate it!
 
Physics news on Phys.org
acu04348 said:
Hi there,Struggling with this problem, anyone know how this might be solved?

(e^(r-0.04)^(5/12))(0.9463) = (e^(r-0.04)^(11/12))(0.95152)

and solve for r

Ans: r~2.90%

Would really appreciate it!
It's hard to tell for certain what you're working with. Is this it?
0.9463(e^{r - .04})^{5/12} = .95152(e^{r - .04})^{11/12}

If so, when you raise an exponent to a power, the exponents multiply, so the above can be rewritten as
0.9463e^{(5/12)(r - .04)} = .95152e^{(11/12)(r - .04)}

Now take the natural log of both sides.
 
Thank you Mark44.
 
Thread 'Determine whether ##125## is a unit in ##\mathbb{Z_471}##'
This is the question, I understand the concept, in ##\mathbb{Z_n}## an element is a is a unit if and only if gcd( a,n) =1. My understanding of backwards substitution, ... i have using Euclidean algorithm, ##471 = 3⋅121 + 108## ##121 = 1⋅108 + 13## ##108 =8⋅13+4## ##13=3⋅4+1## ##4=4⋅1+0## using back-substitution, ##1=13-3⋅4## ##=(121-1⋅108)-3(108-8⋅13)## ... ##= 121-(471-3⋅121)-3⋅471+9⋅121+24⋅121-24(471-3⋅121## ##=121-471+3⋅121-3⋅471+9⋅121+24⋅121-24⋅471+72⋅121##...
##\textbf{Exercise 10}:## I came across the following solution online: Questions: 1. When the author states in "that ring (not sure if he is referring to ##R## or ##R/\mathfrak{p}##, but I am guessing the later) ##x_n x_{n+1}=0## for all odd $n$ and ##x_{n+1}## is invertible, so that ##x_n=0##" 2. How does ##x_nx_{n+1}=0## implies that ##x_{n+1}## is invertible and ##x_n=0##. I mean if the quotient ring ##R/\mathfrak{p}## is an integral domain, and ##x_{n+1}## is invertible then...
It is well known that a vector space always admits an algebraic (Hamel) basis. This is a theorem that follows from Zorn's lemma based on the Axiom of Choice (AC). Now consider any specific instance of vector space. Since the AC axiom may or may not be included in the underlying set theory, might there be examples of vector spaces in which an Hamel basis actually doesn't exist ?
Back
Top